I don't know why but recent incarnations of the humble canned corned beef's taste has changed since my childhood days. You can really taste the chemicals used as preservatives (especially in some famous brands).
My favorite brand is Libby's due to the absence of the chemical-like taste, the over all flavor, and its juiciness despite being a bit dry.
But, alas, my fave brand is a bit expensive. So I have to make do with the usual popular brands.
To 'clean and rinse' the chamical taste, I first sauted some garlic and onions, put in the canned corned beef and put in a quarter cup of water. Wait until the water boils then lower the flame. Cook until the water has evaporated from the mix.
Add a dash of black pepper and a pinch of salt. Feeling a bit adventurous, I added a dash of McCormick's Italian Seasoning.
Continue mixing in the pan until almost all the moisture has evaporated.